万以内加减法

The game is mainly for primary school grade three，corresponding the third grade fourth unit of
primary school mathematics of Human education--Addition and subtraction in ten thousand.
Remember the addition and subtraction method within 100？How do you count when it carry in?
How to migrate to the addition and subtraction of the ten thousand from add and subtract in 100?
Game design follows the rules of learning from easy to difficult.It focus on knowledge transfer
and the cultivation of students' sense of inquiry.Let the students learn from the passive acceptance
into active inquiry.Game screen vivid and interesting, really happy to learn.
QD learn aims at teaching through lively activities and happy learning.